Geophysics and Subsurface Investigations

Phone: (609) 984-6587 * FAX (609) 633-1004

Geophysical Services and Methods

Various geophysical methods are used to investigate the subsurface geological environment for siting ground-water supply wells, studying the occurrence of ground-water contamination, assessing geologic hazards, providing field-based quality control and assurance of consultant geophysical surveys, and for archaeologic investigations. The following electronic glossary elucidates the different geophysical methods.

• Magnetic
• Electrical resistivity, Induced Polarization (IP) and Spontaneous Potential (SP)
• Electromagnetic (EM): Terrain conductivity, Transient EM (TEM), Ground-Penetrating Radar (GPR) and Very-Low-Frequency (VLF) EM
• Seismic Refraction and Reflection
• Gravity
• Borehole geophysics

Geophysical Links

• U.S. Geological Survey (USGS)
• National Geophysical Data Center (NGDC)
• Geologic Society of America (GSA)
• American Association of Petroleum Geologists (AAPG)
• Society of Exploration Geophysicists (SEG)
• Environmental & Engineering Geophysicists Society (EEGS)